Armchair diagnosis here from an RN: The baby's symptoms look similar to a child I know that had a form of Spinal Muscular Atrophy. I'm sure there are other disorders that have similar symptoms but I can't imagine that this isn't something severe. The Mom mentioned that the baby was breech but since her arms and legs are affected, I think it is less likely to be a birth injury. Maybe an OB nurse or pediatrician will chime in. I feel terrible for them and hope this brings them some clarity so they can get their relationship back on track.